/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.thrift.protocol;

import org.apache.thrift.*;

  /**
   * Utility class with static methods for interacting with protocol data
   * streams.
   *
   */
class TProtocolUtil {

    /**
     * Skips over the next data element from the provided input TProtocol object.
     *
     * @param prot  the protocol object to read from
     * @param type  the next value will be intepreted as this TType value.
     */
    public static function skip(prot:TProtocol, type : Int) : Void {
		prot.IncrementRecursionDepth();
		try
		{
			switch (type) {
				case TType.BOOL: 
					prot.readBool();

				case TType.BYTE: 
					prot.readByte();

				case TType.I16: 
					prot.readI16();

				case TType.I32: 
					prot.readI32();

				case TType.I64: 
					prot.readI64();

				case TType.DOUBLE: 
					prot.readDouble();

				case TType.STRING: 
					prot.readBinary();

				case TType.STRUCT: 
					prot.readStructBegin();
					while (true) {
						var field:TField = prot.readFieldBegin();
						if (field.type == TType.STOP) {
						  break;
						}
						skip(prot, field.type);
						prot.readFieldEnd();
					}
					prot.readStructEnd();

				case TType.MAP: 
					var map:TMap = prot.readMapBegin();
					for (i in 0 ... map.size) {
						skip(prot, map.keyType);
						skip(prot, map.valueType);
					}
					prot.readMapEnd();

				case TType.SET: 
					var set:TSet = prot.readSetBegin();
					for (j in 0 ... set.size) {
						skip(prot, set.elemType);
					}
					prot.readSetEnd();

				case TType.LIST: 
					var list:TList = prot.readListBegin();
					for (k in 0 ... list.size) {
						skip(prot, list.elemType);
					}
					prot.readListEnd();

				default:
					trace("Unknown field type ",type," in skipMaxDepth()");
			}
			
			prot.DecrementRecursionDepth();
		}
		catch(e:Dynamic)
		{
			prot.DecrementRecursionDepth();
			throw e;
		}
    }

}
